function ltrim(s) { return s.replace( /^\s*/, "" ); }
function rtrim(s) { return s.replace( /\s*$/, "" ); }
function trim(s) { return rtrim(ltrim(s)); }

// Caio Ariede, Kevin van Zonneveld, Brett Zamir, Wagner B. Soares, David

function isEmail(email) {
	return /^[a-zA-Z0-9\._%\+\-]+@[a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,6}$/.test(email);
}


function strtotime (str, now) {
    var i, match, s, strTmp = '', parse = ''; 
    strTmp = str;
    strTmp = strTmp.replace(/\s{2,}|^\s|\s$/g, ' '); // unecessary spaces
    strTmp = strTmp.replace(/[\t\r\n]/g, ''); // unecessary chars
 
    if (strTmp == 'now') {
        return (new Date()).getTime()/1000; // Return seconds, not milli-seconds
    } else if (!isNaN(parse = Date.parse(strTmp))) {
        return (parse/1000);
    } else if (now) {
        now = new Date(now*1000); // Accept PHP-style seconds
    } else {
        now = new Date();
    }
 
    strTmp = strTmp.toLowerCase();
 
    var __is =
    {
        day:
        {
            'sun': 0,
            'mon': 1,
            'tue': 2,
            'wed': 3,
            'thu': 4,
            'fri': 5,
            'sat': 6
        },
        mon:
        {
            'jan': 0,
            'feb': 1,
            'mar': 2,
            'apr': 3,
            'may': 4,
            'jun': 5,
            'jul': 6,
            'aug': 7,
            'sep': 8,
            'oct': 9,
            'nov': 10,
            'dec': 11
        }
    };
 
    var process = function (m) {
        var ago = (m[2] && m[2] == 'ago');
        var num = (num = m[0] == 'last' ? -1 : 1) * (ago ? -1 : 1);
 
        switch (m[0]) {
            case 'last':
            case 'next':
                switch (m[1].substring(0, 3)) {
                    case 'yea':
                        now.setFullYear(now.getFullYear() + num);
                        break;
                    case 'mon':
                        now.setMonth(now.getMonth() + num);
                        break;
                    case 'wee':
                        now.setDate(now.getDate() + (num * 7));
                        break;
                    case 'day':
                        now.setDate(now.getDate() + num);
                        break;
                    case 'hou':
                        now.setHours(now.getHours() + num);
                        break;
                    case 'min':
                        now.setMinutes(now.getMinutes() + num);
                        break;
                    case 'sec':
                        now.setSeconds(now.getSeconds() + num);
                        break;
                    default:
                        var day;
                        if (typeof (day = __is.day[m[1].substring(0, 3)]) != 'undefined') {
                            var diff = day - now.getDay();
                            if (diff == 0) {
                                diff = 7 * num;
                            } else if (diff > 0) {
                                if (m[0] == 'last') {diff -= 7;}
                            } else {
                                if (m[0] == 'next') {diff += 7;}
                            }
                            now.setDate(now.getDate() + diff);
                        }
                }
                break;
 
            default:
                if (/\d+/.test(m[0])) {
                    num *= parseInt(m[0], 10);
 
                    switch (m[1].substring(0, 3)) {
                        case 'yea':
                            now.setFullYear(now.getFullYear() + num);
                            break;
                        case 'mon':
                            now.setMonth(now.getMonth() + num);
                            break;
                        case 'wee':
                            now.setDate(now.getDate() + (num * 7));
                            break;
                        case 'day':
                            now.setDate(now.getDate() + num);
                            break;
                        case 'hou':
                            now.setHours(now.getHours() + num);
                            break;
                        case 'min':
                            now.setMinutes(now.getMinutes() + num);
                            break;
                        case 'sec':
                            now.setSeconds(now.getSeconds() + num);
                            break;
                    }
                } else {
                    return false;
                }
                break;
        }
        return true;
    };
 
    match = strTmp.match(/^(\d{2,4}-\d{2}-\d{2})(?:\s(\d{1,2}:\d{2}(:\d{2})?)?(?:\.(\d+))?)?$/);
    if (match != null) {
        if (!match[2]) {
            match[2] = '00:00:00';
        } else if (!match[3]) {
            match[2] += ':00';
        }
 
        s = match[1].split(/-/g);
 
        for (i in __is.mon) {
            if (__is.mon[i] == s[1] - 1) {
                s[1] = i;
            }
        }
        s[0] = parseInt(s[0], 10);
 
        s[0] = (s[0] >= 0 && s[0] <= 69) ? '20'+(s[0] < 10 ? '0'+s[0] : s[0]+'') : (s[0] >= 70 && s[0] <= 99) ? '19'+s[0] : s[0]+'';
        return parseInt(this.strtotime(s[2] + ' ' + s[1] + ' ' + s[0] + ' ' + match[2])+(match[4] ? match[4]/1000 : ''), 10);
    }
 
    var regex = '([+-]?\\d+\\s'+
        '(years?|months?|weeks?|days?|hours?|min|minutes?|sec|seconds?'+
        '|sun\.?|sunday|mon\.?|monday|tue\.?|tuesday|wed\.?|wednesday'+
        '|thu\.?|thursday|fri\.?|friday|sat\.?|saturday)'+
        '|(last|next)\\s'+
        '(years?|months?|weeks?|days?|hours?|min|minutes?|sec|seconds?'+
        '|sun\.?|sunday|mon\.?|monday|tue\.?|tuesday|wed\.?|wednesday'+
        '|thu\.?|thursday|fri\.?|friday|sat\.?|saturday))'+
        '(\\sago)?';
 
    match = strTmp.match(new RegExp(regex, 'g'));
    if (match == null) {
        return false;
    }
 
    for (i in match) {
        if (!process(match[i].split(' '))) {
            return false;
        }
    }
 
    return (now.getTime()/1000);
}

// NOT SURE WHO WROTE THIS
String.prototype.autolink = function() {
	var hlink = /\s(ht|f)tp:\/\/([^ \,\;\:\!\)\(\"\'\<\>\f\n\r\t\v])+/g;
	return this.replace (
		hlink, 
		function ($0, $1, $2) {
			s = $0.substring(1, $0.length);
			while (s.length > 0 && s.charAt(s.length-1)=='.') {
				s = this.substring(0, s.length-1);
			}
			return " " + s.link(s); 
		}
	);
}

// http://www.json.org/json2.js
var JSON = {
	parse:function(code) {
		if (/^[\],:{}\s]*$/.test(code.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(:?[eE][+\-]?\d+)?/g, ']').replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
			return eval('('+code+')');
		}
		return null;
	}
};

function addslashes(str) {
	str=str.replace(/\\/g,'\\\\');
	str=str.replace(/\'/g,'\\\'');
	str=str.replace(/\"/g,'\\"');
	str=str.replace(/\0/g,'\\0');
	return str;
}

function stripslashes(str) {
	str=str.replace(/\\'/g,'\'');
	str=str.replace(/\\"/g,'"');
	str=str.replace(/\\0/g,'\0');
	str=str.replace(/\\\\/g,'\\');
	return str;
}

// NOT SURE WHO WROTE THIS ONE
function prettyDate(time){
	var date = new Date(time*1000),
		diff = (((new Date()).getTime() - date.getTime()) / 1000),
		day_diff = Math.floor(diff / 86400);
	
	if ( isNaN(day_diff) || day_diff < 0 )
		return;
	
	return day_diff == 0 && (
		diff < 60 && "just now" ||
		diff < 120 && "1 minute ago" ||
		diff < 3600 && Math.floor( diff / 60 ) + " minutes ago" ||
		diff < 7200 && "1 hour ago" ||
		diff < 86400 && Math.floor( diff / 3600 ) + " hours ago") ||
		day_diff == 1 && "Yesterday" ||
		day_diff < 7 && day_diff + " day" + (day_diff == 1 ? "" : "s") + " ago" ||
		Math.ceil( day_diff / 7 ) + " week" + (day_diff <= 7 ? "" : "s") + " ago";
}